Vehicle window assembly

ABSTRACT

A window assembly for a vehicle provides at least one fixed panel or window and a movable panel or window. A one piece frame is formed which includes a perimeter frame and at least one dividing member. The window panel assembly may be adapted for a vehicle door, whereby the fixed window panel is secured to the dividing member and a portion of the perimeter frame, while the movable window panel slidably engages a portion of the perimeter frame with one edge and the dividing member with the other edge, which is opposite the first edge. A rail or guide member is secured to the second edge of the movable panel for slidable engagement with the dividing member. The rail member and guide member allow the movable window panel and fixed window panel to form a substantially flush, continuous, planar surface across their adjacent edges, while still providing a substantially airtight seal therebetween. Alternately, the window panel assembly may be adapted for a back lite of the vehicle, whereby the movable window panel slidably engages a pair of dividing members. A fixed window panel is positioned between each of the dividing members and a side leg of the perimeter frame.

CROSS-REFERENCE TO RELATED APPLICATION

This is a division of U.S. pat. application, Ser. No. 09/611,727, filedJul. 7, 2000, by Timothy A. Davis and Loren B. Renkema, entitled VEHICLEWINDOW ASSEMBLY, now U.S. Pat. No. 6,220,650, the disclosure of which ishereby incorporated by reference herein.

BACKGROUND OF THE INVENTION

This invention relates generally to vehicle window assemblies and, moreparticularly, to a vehicle window assembly having both a fixed windowand a movable window.

Often, a rear side door of a sedan or other similar vehicle includes afixed, generally triangular shaped window and a larger, rectangular orother shaped movable window. The smaller fixed window, commonly referredto as a vent window or fixed vent, is typically required in order toavoid interference of the movable window with the rear wheel well of thevehicle when the window is lowered. By placing the larger rectangularmovable window forward of the fixed window, the larger movable windowmay be completely lowered to a fully opened position, while the fixedvent window does not detract from visibility through the windows by thedriver or passengers of the vehicle.

Because the movable window slides upwardly and downwardly adjacent tothe fixed vent window, the molding or trim surrounding the fixed ventwindow must include a track or channel along its forward edge forslidable engagement of the movable window with the track or channel.This results in a portion of the seal or gasket between the two windowsextending outwardly and overlapping an outer surface of the windowsalong the adjacent edges thereof. This further results in a lack ofsurface continuity between the windows, which not only detracts from thestyling and appearance of the vehicle, but may cause aerodynamic dragand wind noise as the vehicle is being driven. Also, the seals betweenthe window panels and door frames are typically glued together at thecorner where a division post seal meets and adjoins with a header seal.This may result in air and/or water leakage at these corners due to thelack of surface continuity along the seals where their ends are glued orotherwise adhered together.

An additional concern with these rear door window assemblies is thatthey are made up of several parts, which must be tightly sealed in orderto prevent water leakage or wind noise. Due to the large number ofchannels, fasteners and seals that are typically implemented in thesewindow assemblies, water leakage may result when the parts do not fittogether precisely. Additional clips and fasteners have also beenproposed to facilitate tight securement of the assemblies to thevehicle. However, the numerous parts of the assemblies add to the costof the door and window assembly and further require additional assemblyprocesses in order to properly install them to the vehicle.

Other window modules have been proposed which mold a corner seal at anupper end of the division post where it adjoins the header of thedoorframe. An encapsulating trim and seal may also be formed around thefixed window and a portion of the division post and header strip. Whilesuch modules may provide a more uniform curved seal at the comers wherethe division post meets the header strip, they require numerous separateparts and processes. Each post and strip, along with their respectiveseals, must be properly aligned within a mold, which then forms agenerally T-shaped seal portion which interconnects with the seals ofthe header strip and the division post. The seals of these windowmodules also extend outwardly from an exterior surface of the windowsalong the adjacent edge thereof.

Although a window assembly having a fixed vent window panel and amovable window panel is typically implemented at a side door of avehicle, similar window assemblies with a movable window panel slidingbetween a pair of fixed window panels may be implemented at a rearwindow or back lite of a vehicle, such as a pickup truck or the like.Both of the side, fixed panels then include channels or track therealongfor slidable engagement by the movable window panel. This results in aportion of the track and/or seals protruding between the windows, whichagain results in a lack of surface continuity between the windows andthus detracts from the styling and appearance of the vehicle.

Therefore, there is a need in the art for a vehicle window assemblywhich provides both fixed and movable windows with a tight seal aroundthe windows to minimize air and water leakage therethrough. Furthermore,the window assembly should require a minimal number of separate partsand processes in order to properly install the assembly to the vehicledoor.

SUMMARY OF THE INVENTION

The present invention is intended to provide a window assembly for avehicle, and especially for a rear side door of a vehicle, with surfacecontinuity between a fixed window and a movable window of the assembly,thereby improving the appearance of the door and minimizing drag andwind noise when the vehicle is in motion. The invention is equallyapplicable to back lite window assemblies, such as rear windows forpickup trucks and the like, where a movable window panel is slidablebetween a pair of fixed panels.

According to a first aspect of the present invention, a window assemblymodule for a vehicle is assembled remotely from a vehicle assembly plantand is installed at the vehicle at the vehicle assembly plant. Thewindow assembly module comprises a frame adapted to secure to thevehicle, at least one fixed window panel and a movable window panel. Theframe includes a perimeter frame and at least one dividing memberextending between a pair of perimeter legs of the perimeter frame. Thefixed window panel has an inner surface and outer surface and issecurable to the perimeter frame and dividing member. The movable panelhas an inner surface and outer surface and first and second perimeteredges. The movable window panel is slidably positioned at the frame suchthat the first perimeter edge is slidably engagable with the dividingmember and the second perimeter edge is slidably engageable with anotherdividing member or one of the perimeter legs. The outer surfaces of thefixed window panel and of the movable window panel form a generallyflush surface when the movable window panel is at least partiallyclosed. Preferably, a guide member is secured to the inner surface alongat least one of the perimeter edges of the movable window panel. Theguide member is slidably engagable with the dividing member or members.Preferably, a resilient seal is included along the perimeter frame toreduce air and/or water leakage between the window panel and the frame.The resilient seal may be integrally molded with the frame and may varyin cross section along different regions of the perimeter frame.

In one form, the window assembly is adapted for a side door of thevehicle. The window assembly includes a rearward fixed panel and aforward movable window. The fixed panel is secured to a dividing memberand a rearward leg of the frame, while the movable window is slidablebetween the dividing member and a forward leg of the frame. The guidemember along the inner surface of the movable window slidably engagesthe dividing member such that the movable window and fixed window panelform a generally continuous, flush surface when the movable panel is atleast partially closed.

In another form, the window assembly is adapted for a back lite of avehicle and comprises a pair of opposite side fixed window panelsmounted at and between a perimeter leg and dividing member of the windowframe assembly. The movable window panel slidably engages each of thepair of dividing members and provides a continuous, flush surfacebetween the fixed window panels and the movable window panel when themovable window panel is at least partially closed. A pair of guidemembers is provided at an inner surface of the movable window panel, onealong each side edge of the window panel such that one guide memberslidably engages the dividing member at each side window.

Preferably, the guide member or dividing member comprise a generallyC-shaped channel, while the other comprises an inward extension whichslidably engages the C-shaped channel. A slidable seal is providedbetween the extension and the C-shaped channel to allow slidablemovement therebetween, while preventing water or the like frompenetrating from the outside of the window assembly to the interior ofthe vehicle.

Therefore, the present invention provides a vehicular window assemblywhich includes at least one fixed window panel and a movable windowpanel which form a substantially flush and continuous surface betweenthe window panels. This results in a more aesthetically pleasing surfacecontinuity while reducing wind noise when the vehicle is in motion. Anadditional benefit is that fewer parts are required to substantiallyseal the two window panels to the frame at the vehicle, while stillallowing for easy raising and lowering of the movable window panel. Thewindow module may be inserted into a recess of a vehicle panel or doorand secured thereto with a minimal number of fasteners.

These and other objects, advantages, purposes and features of thisinvention will become apparent upon review of the followingspecification in conjunction with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a vehicle incorporating a rear side doorwindow assembly of the present invention;

FIG. 2 is an outside perspective view of the window assembly of FIG. 1;

FIG. 3 is an exploded inside perspective view of the window assembly ofFIG. 1, as viewed from an interior side of the window assembly;

FIG. 4A is a sectional view along the line IV—IV in FIG. 1;

FIG. 4B is a sectional view similar to FIG. 4A, with a spacing bracketinstalled within the doorframe;

FIG. 5 is a sectional view along the line V—V in FIG. 1;

FIG. 6A is a sectional view similar to FIGS. 4A and 4B of an alternateembodiment of the frame of the present invention;

FIG. 6B is a perspective view of the frame of FIG. 6A;

FIG. 7 is a sectional view along the line VII—VII in FIG. 1;

FIG. 8A is a sectional view along the line VIII—VIII in FIG. 1, with aseal attached to the rail of the present invention;

FIG. 8B is a sectional view similar to FIG. 8A with the seal attached tothe frame divider;

FIG. 9 is a sectional view similar to FIGS. 8A and 8B of an alternateguide and frame of the present invention;

FIG. 10 is a sectional view along the line X—X in FIG. 1 with the frameand guide of FIG. 9;

FIG. 11 is a sectional view similar to FIGS. 8A, 8B and 9 of analternate dividing guide/seal in accordance with the present invention;

FIG. 12 is a view similar to FIG. 2 of an alternate embodiment of thepresent invention having a one-piece channel member which extendsdownward into the door of the vehicle;

FIG. 13 is a rear perspective view of a vehicle incorporating a verticalsliding rear window in accordance with the present invention;

FIG. 14 is a rear elevation, looking forwardly with respect to thevehicle, of the vertical sliding window assembly of FIG. 13;

FIG. 15 is a sectional view along the line XV—XV in FIG. 14;

FIG. 16 is a sectional view along the line XVI—XVI in FIG. 14; and

FIG. 17 is a sectional view along the line XVII—XVII in FIG. 14.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now specifically to the drawings and the illustrativeembodiments depicted therein, there is shown in FIG. 1 a door windowassembly 10 implemented in a rear side door 12 of a vehicle 14. Windowassembly 10 is preferably a modular assembly which may be installed at adoor or panel of a vehicle and substantially encases a fixed vent windowpanel or window 16 and a larger generally rectangular and movable windowpanel or window 18. Movable window 18 may be lowered into vehicle door12 to provide an opening through the window assembly, as is known in theart. As shown in FIGS. 2 and 3, window assembly 10 includes a generallyE-shaped framing member 20 which substantially surrounds three of thefour perimeter edges of each of window panels 16 and 18 and includes adividing member 22 unitarily formed with framing member 20 and whichseparates or divides the two window panels. A sealing member 21 ispositioned along frame 20 to substantially preclude water and/or airleakage into or out from the inside of vehicle 14. Sealing member 21 ispreferably an inverted U-shape and corresponds to the U-shaped outerperimeter of frame 20 as shown in FIG. 3. Fixed window panel 16 isbonded or otherwise secured to dividing member 22 and a portion of frame20, while movable window panel 18 slidably engages divider 22 and aforward portion or leg 30 of frame 20. A rail or guide member 24 (FIGS.3, 8A and 8B) is preferably bonded or otherwise secured along a rearwardedge 18 a of movable window panel 18, such that rail member 24 slidablyengages a channel or track 22 a of dividing member 22. As shown in FIGS.1, 2, 8A and 8B, this allows fixed window panel 16 and movable windowpanel 18 to be substantially flush-mounted relative to one another, suchthat an outer surface of both window panels form a generally smooth,flush, continuous planar surface, having no seal or trim moldingextending outwardly between the adjacent edges of the window panels,thereby reducing aerodynamic drag and wind noise when the vehicle is inmotion. Although described as having a flush surface, movable window 18may be positioned slightly laterally outwardly from fixed window panel16 and dividing member 22, in order to reduce or limit air flow betweenthe window panels as the vehicle is being driven, as shown for examplein FIG. 11. Also, although shown and described as having the movablewindow panel positioned forwardly of the fixed window with a rearwardedge of the movable window panel being slidable along a forward edge ofthe fixed window panel, clearly the scope of the present inventionincludes other window or panel assemblies where a movable panel may beoriented in any other manner relative to one or more fixed panels or asecond movable panel. For example, a vertical sliding window assemblymay be implemented at a rear window of a pickup truck or the like, asshown in FIGS. 13-17 and discussed below. In order to simplify thediscussion, the window assembly 10 will be described with respect toFIGS. 1-12 as having a movable panel positioned forwardly of a fixedpanel at a side door of a vehicle. Preferably, window assembly 10 is amodular assembly, which is formed and assembled at a location remotefrom the vehicle assembly plant. The modular window assembly is theninsertable as a unit into an appropriate opening in the vehicle andsecured therein.

As best shown in FIG. 3, frame 20 is generally E-shaped, having an uppermember 26, a rearward leg 28 and a forward leg 30, along with dividingmember 22. Frame 20 and dividing member 22 are integrally formed ormolded in one piece of a substantially rigid material. Preferably, thismaterial is a rigid plastic, such as polyethylene terephthalate (PET),polypropylene, nylon, acrylonitrile-butadeine-styrene (ABS) orthermoplastic urethane (TPU). However, frame 20 may be otherwise formedfrom a formable metal material, without affecting the scope of thepresent invention. Upper member 26, rearward leg 28 and forward leg 30substantially surround or encase the window panels 16 and 18 of windowassembly 10 except for the bottom or lower perimeter edges of the windowpanels, and may have different cross sections for receiving seal 21 anda portion of either movable window panel 18 or fixed window panel 16, asdiscussed below.

Fixed window 16 is shown generally in the shape of a truncated triangleand includes a rearward edge 16 b, an upper edge 16 c, a forward edge 16d and a lower edge 16 f. However, fixed window 16 may be substantiallyrectangular-shaped or triangular-shaped, or other shape depending on theapplication, without affecting the scope of the present invention. Aceramic frit layer 16 e or other known coating is preferably applied toan inner surface 16 a of fixed window 16 along the outer perimeter edgesthereof. The frit layer 16 e is opaque and functions to facilitateadhering or bonding of the edges 16 b, 16 c and 16 d of window 16 toframe 20 and dividing member 22, while also improving the overallappearance of the window, since the bonding surfaces are then notvisible from the exterior of the window.

Movable window panel 18 is generally rectangular-shaped and preferablyof a size greater than fixed vent window panel 16. Movable window panel18 includes a rearward edge 18 a, an upper edge 18 b, a forward edge 18c and a lower edge 18 f. An inner surface 18 d of movable window panel18 along rearward edge 18 a preferably is also coated with a ceramicflit layer 18 e or the like in a conventional manner. The frit layer 18e provides a bonding or attaching surface for bonding or otherwisesecuring a mounting surface 24 b of rail member 24 to inner surface 18 dof movable window panel 18 (FIGS. 8A and 8B) and also improves theappearance of the window assembly since the attaching surfaces will notbe visible from the exterior of the vehicle. Movable window panel 18 israised upwardly to a closed position or lowered downwardly to an openposition in a conventional manner, such that forward edge 18 c slidablyengages forward leg 30 of frame 20 and a corresponding forward portion23 of seal 21.

Preferably, fixed window panel 16 and movable window panel 18 are madeof a clear or tinted glass. However, fixed window panel 16 and/ormovable window panel 18 may be otherwise molded or formed from a plasticmaterial, such as a polycarbonate material or the like, withoutaffecting the scope of the present invention.

Referring now to FIG. 4A, upper member 26 of frame 20 may have asubstantially L-shaped cross section in a region forward of divider 22for receiving upper edge 18 b of movable window panel 18 when windowpanel 18 is closed. The L-shaped region of upper member 26 includes anattaching portion 26 a and a seal retaining portion 26 b. A plurality offasteners 31 are preferably included along attaching portion 26 a ofupper member 26, in order to secure window assembly 10 within vehicledoor 12. Preferably, the sheet metal and/or plastic trim of vehicle door12 may form a substantially U-shaped channel 32 for receiving uppermember 26 of frame 20 therein. Attaching portion 26 a of upper member 26is then secured to a downwardly extending inner wall 32 a of vehicledoor 12, such that seal-retaining portion 26 b extends substantiallyhorizontally and outwardly therefrom. As shown in FIG. 4B, vehicle door12 may further include one or more brackets 33 positioned within andalong U-shaped channel 32 which function to maintain the U-shapedchannel 32 in vehicle door 12 at a substantially constant width acrossthe upper portion of vehicle door 12, as is known in the art. Bracket 33may extend along U-shaped channel 32 or may include several bracketsspaced apart along channel 32. Attaching portion 26 a of upper member 26may then be fastened to an inner leg 33 a of bracket 33 and/or innerwall 32 a of vehicle door 12. Upper member 26 may also be formed to fitalong inner wall 32 a with recesses 26 d (FIG. 3) formed along attachingportion 26 a to fit around brackets 33, such that upper member 26provides a substantially uniform engagement with both the inner legs 33a of brackets 33 and the inner wall 32 a of vehicle door 12. As shown inFIG. 5, the cross section of forward leg 30 is preferably substantiallysimilar to the cross section of upper member 26 with an attachingportion 30 a being secured within a channel 37 formed in door 12 while aseal retaining portion 30 b extends outwardly therefrom.

Referring now to FIG. 7, rearward leg 28 includes a generally U-shapedchannel 28 a along which a rear portion 21 d of seal 21 is preferablypositioned. The U-shaped channel 28 a is preferably formed by an innerseal retaining portion 28 e and an outer leg 28 c interconnected atcorresponding ends thereof by a base portion 28 f. Rearward leg 28 isalso positioned within a U-shaped channel 35 formed by the sheet metal,plastic or other material of vehicle door 12 similar to upper member 26,with base portion 28 f extending along and engaging an inner wall 35 aof a U-shaped channel 35 of vehicle door 12, while seal retainingportion 28 e and outer leg 28 c of U-shaped channel 28 a extendoutwardly therefrom.

A window mounting extension 28 b extends forwardly from an end of outerleg 28 c of U-shaped channel 28 a. Window mounting extension 28 bprovides a substantially flat, smooth surface 28 d on rearward leg 28,for mounting or bonding interior surface 16 a along rearward edge 16 bof fixed window panel 16 thereto. Optionally, mounting or bondingsurface 28 d may further include a plurality of projections (not shown)therealong to provide a predetermined gap between the bonding surface 28d and fixed window panel 16 to facilitate bonding of the componentstogether. A rearward portion 26 c of upper member 26 rearward of divider22 may have a substantially similar cross section as rearward leg 28,such that interior surface 16 a along upper edge 16 c of fixed windowpanel 16 may be similarly secured or bonded to an upper mounting surface(not shown), in cases where fixed window panel 16 may be substantiallytruncated or rectangular shaped, as shown in FIGS. 1, 2, 3 and 12.Because frame 20 may be integrally molded from a rigid plastic material,such differences in the cross section of the frame in different regionsmay be provided by varying the mold in those areas, thereby providing acontinuous framing member which allows for different attachment meansfor the window and/or seal therealong.

Referring now to FIGS. 3, 8A and 8B, divider 22 is a substantiallyU-shaped channel member extending downwardly from upper member 26 andterminating at a point just below the lower ends of forward and rearwardlegs 30 and 28. A U-shaped channel 22 a of divider 22 is preferablyformed between an outer leg 22 c and an inner leg 22 d, which cooperateto receive slidable seal 38 or 39 (discussed below) and rail member 24extending from movable window panel 18. Outer leg 22 c further includesa mounting or bonding surface 22 e, which provides a substantiallysmooth surface for securing inner surface 16 a along forward edge 16 dof fixed window panel 16 thereto. Preferably, inner surface 16 a offixed window panel 16 is adhered or bonded to mounting surface 22 e. Asdiscussed above with respect to bonding surface 28 d of rearward leg 28,bonding surface 22 e of divider 22 may include a plurality ofprotrusions or projections (not shown) for spacing fixed window panel 16from bonding surface 22 e, thereby facilitating bonding between the twocomponents.

Divider 22 may further include a mounting bracket or tab 34 extendingrearwardly from a lower end 22 b of divider 22 (FIGS. 2 and 3). Amounting hole 34 a is formed through bracket or tab 34, such thatdivider 22 of window frame 20 may be secured to vehicle door 12 with afastener (not shown) through opening 34 a and an upper portion ofvehicle door 12. When secured by bracket 34, channel 22 a of divider 22is aligned with a lower channel (not shown), which is separately securedin the door and guides movable window 28 downward into vehicle door 12when movable window panel 18 is lowered.

Referring again to FIGS. 3 and 8A, rail or guide member 24, includes amounting or bonding flange 24 a, which further includes a mounting orbonding surface 24 b onto which inner surface 18 d along rearward edge18 a of movable window panel 18 is secured, such as by bonding, adhesiveor the like. Bonding surface 24 b may include projections or protrusions(not shown) projecting outwardly therefrom to provide a predeterminedspace between frit layer 18 e on inner surface 18 d of movable windowpanel 18 and bonding surface 24 b to optimize the bonding therebetween.Preferably, guide member 24 is formed or molded from PET, nylon or TPUmaterial. Guide member 24 further includes a sliding portion orextension 24 c which extends rearwardly from bonding portion 24 a and isspaced inwardly therefrom. Sliding portion 24 c slidingly engagesU-shaped channel 22 a of divider 22 to guide and seal movable windowpanel 18 as it is opened and closed. A slidable seal 38 may be bonded orotherwise secured to the sides and end of sliding portion 24 c. Slidableseal 38 includes one or more lips or extensions (not shown) extendingbetween seal 38 and divider 22, such that slidable seal 38 facilitatesslidable engagement of rail member 24 by reducing friction with theU-shaped channel 22 a of dividing member 22, while providing ansubstantially airtight seal between rail 24 and divider 22. Preferably,seal 38 is formed from ethylene propylene deine monomer (EPDM),santoprene, TPE, or the like, and is adhered to sliding portion 24 cusing a suitable adhesive. Alternately, as shown in FIG. 8B, a similarU-shaped seal 39 may be bonded or otherwise secured along the walls ofthe U-shaped channel of divider 22, such that slidable seal 39 slidablyengages sliding portion 24 c of rail member 24, again providing asubstantially airtight seal between divider 22 and rail member 24. Whilefacilitating sliding action by reducing friction, like seal 38, seal 39is preferably formed from EPDM, santoprene, TPE or similar materials.

Referring now to FIGS. 3, 4A, 4B, 5 and 7, resilient seal 21 preferablyextends around a perimeter portion of frame 20 which includes uppermember 26 and forward and rearward legs 30 and 28. Similar to frame 20,resilient seal 21 is also preferably formed with varying cross sectionsin different regions of the perimeter frame 20 and, most preferably,also formed from different materials in different regions. For example,seal 21 may be formed from a soft material in an upper forward region 21b and a rearward region 21 d, while being formed from a more rigidmaterial along a forward leg portion or region 23. This results inimproved sealing between window panels 16 and 18 and frame 20, whilefacilitating slidable engagement between movable window panel 18 andseal 21. Preferably, resilient seal 21 is formed or molded from ethylenepropylene deine monomer (EPDM), santoprene and/or TPE material. Seal 21includes an attaching flange or lip 21 a (FIGS. 4A, 5 and 7) which ispreferably substantially rigid for securing seal 21 to frame 20 byextending around and over seal retaining portions 26 b, 28 e and 30 b onframe members 26, 28 and 30, respectively.

As shown in FIGS. 4A and 4B, upper, forward region 21 b of seal 21 ispreferably a bulbous seal, having a hollow, enclosed area portion 21 eextending therealong which corresponds to a portion of upper member 26extending forwardly of divider 22. This allows upper edge 18 b ofmovable window panel 18 to easily compress seal 21 by engaging lowermostwall 21 f of seal 21 and flexing the wall into hollow area 21 e as thewindow is closed, thereby providing a substantially airtight sealbetween seal 21 and movable window panel 18. Upper portion 21 b ispreferably formed from a soft, compressible and flexible material, inorder to provide a uniform seal along upper edge 18 b of movable windowpanel 18 as upper edge 18 b engages and compresses upper seal 21 b. Anoutermost portion 21 g of seal 21 engages the outer sheet metal wall 32b of the vehicle door 12, or the outer leg 33 b of bracket 33, to sealthe frame to the door and prevent air and water leakage therebetween.

Forward leg portion 23 (FIGS. 3 and 5) of seal 21 extends downwardlyalong forward leg 30 and is preferably molded from a more rigid materialthan the upper portion 21 b, in order to facilitate sliding of forwardedge 18 c of movable window panel 18 along forward leg 30 and to preventdamage to seal 21 as movable window panel 18 is raised and loweredtherealong. As shown in FIG. 5, forward leg 23 of seal 21 may provide adifferent seal configuration along forward leg 30 of frame 20 to furtherfacilitate sliding forward edge 18 c of movable window panel 18therealong. This varying configuration may be in the form of aconventional lip seal or the like which forms a channel within whichforward edge 18 c of movable window panel 18 slidably engages.Preferably, forward region 23 of seal 21 includes a flexible inner lip23 a, a flexible outer lip 23 b and attaching lip 21 a. Inner lip 23 aslidably engages inner surface 18 d of movable window panel 18 andflexes inwardly as movable window panel 18 moves into contact therewith.Outer lip 23 b similarly slidably engages an outer surface 18 g ofmoveable window panel 18 and flexes outwardly as movable window panel 18moves into contact therewith. Accordingly, when movable window panel 18is opening and/or closing, forward edge 18 c slides between inner lip 23a and outer lip 23 b. When movable window panel 18 is at least partiallyclosed, inner lip 23 a and outer lip 23 b of seal 21 engage movablewindow panel 18 and cooperate to substantially reduce air and/or waterleakage around forward edge 18 c of movable window panel 18. Anoutermost portion 23 c of forward leg 23 engages the outer sheet metalwall of the door to substantially preclude air and water leakagetherebetween.

As shown in FIG. 7, rearward portion 21 d of seal 21 is preferably asubstantially solid yet resilient sealing member extending alongrearward leg 28 and rearward upper portion 26 c of frame 20, althoughseal 21 may alternatively be a bulb seal in this region, similar toupper forward region 21 b, without affecting the scope of the presentinvention. Seal 21 is again preferably a soft rubber-like material whichallows the upper and rearward edges 16 c and 16 b respectively, of fixedwindow panel 16 to compress a portion of seal 21, thereby providing asubstantially airtight seal between seal 21 and fixed window panel 16when fixed window panel 16 is bonded or otherwise secured to frame 20.Because seal 21 is a unitarily molded seal which provides asubstantially uniform and continuous attaching flange along sealingportions 21 b, 23 and 21 d at perimeter frame 20, an airtight seal maybe provided in the corners of perimeter frame 20, as well as at thejunction of dividing member 22 and perimeter frame 20.

When assembled, seal 21 is frictionally held to frame 20 along forwardleg 30, upper member 26 and rearward leg 28. As shown in FIGS. 4, 5 and7, attaching portions 21 a and 23 c of seal 21 overlap and extend aroundseal retaining portions 26 b, 28 e and 30 b of frame 20, therebysubstantially securing seal 21 to frame 20. Seal 21 is preferablyretained along frame 20 due to a frictional engagement of the materialof seal 21 with frame 20. Additionally, a stiffening member (not shown)may be included in the retaining portions 21 a and 23 c of seal 21 toprevent the lip from flexing, thereby substantially precluding seal 21from being removed from frame 20 during the assembly processes ofvehicle door 12. Clearly, however, seal 21 may be adhered, molded orotherwise secured to frame 20 without affecting the scope of the presentinvention.

Fixed window panel 16 is preferably bonded to frame 20 along rearwardportion 26 c of upper member 26 and along rearward leg 28. Morespecifically, as shown in FIG. 7, bonding extension 28 b of rearward leg28 is bonded to frit layer 16 e on inner surface 16 a along rearwardedge 16 b of fixed window panel 16. Similarly, a corresponding bondingextension along upper member 26 rearward of divider 22 may be bonded tofrit layer 16 e on inner surface 16 a along upper edge 16 c of fixedwindow panel 16. Fixed window panel 16 is bonded or adhered to themounting extensions of frame 20 such that upper and rearward edges 16 cand 16 b engage with corresponding portions of seal 21, therebycompressing seal 21 to provide a substantially airtight sealtherebetween. As shown in FIG. 7, this also results in seal 21 beingpressed outwardly to further engage an outer side wall 35 b of channel35 of vehicle door 12, thereby substantially precluding air and/or waterfrom passing therebetween. Additionally, as shown in FIGS. 8A and 8B,mounting surface 22 e of divider 22 may be similarly bonded or adheredto frit layer 16 e on inner surface 16 a along forward edge 16 d offixed window panel 16. Fixed window panel 16 is thus bonded or otherwisesecured to frame 20 along three of its perimeter edges, therebysubstantially securing fixed window panel 16 within window assembly 10.

Rail member 24 may be similarly bonded or adhered to frit layer 18 e oninner surface 18 d along rearward edge 18 a of movable window panel 18.Mounting surface 24 b of rail member 24 is secured to movable windowpanel 18, such that sliding portion 24 c extends rearwardly fromrearward edge 18 a of movable window panel 18. Sliding portion 24 c isalso formed in a plane which is spaced inwardly from a plane defined bymovable window panel 18.

When fully assembled, as shown in FIGS. 8A and 8B, movable window panel18 and fixed window panel 16 are substantially flush-mounted relative toone another, since no additional exterior trim components are includedon their outer surfaces along their adjacent edges. Because rail 24 issecured to movable window panel 18 and extends inwardly into the channelof divider 22 and is substantially sealed therewithin, an airtight sealis formed between movable window panel 18 and fixed window panel 16without requiring any additional seals or trim pieces to fill the gapstherebetween. The end result is a substantially smooth, flush andcontinuous planar surface formed by the two window panels of windowassembly 10, which further results in a more aesthetically pleasingsurface continuity. The term “flush” is herein used to define a surfacebetween the two window panels which is generally continuous and coplanarand is void of any outwardly protruding trim pieces. However, the termfurther includes a window surface where the movable or forward windowpanel may be slightly laterally offset outwardly from the fixed orrearward window panel to further reduce or limit air or water intrusionbetween the window panels as the vehicle is being driven. The absence ofany outwardly protruding trim pieces between the window panels also mayreduce wind noise when vehicle 14 is driven. An additional benefit ofthis design is that less parts are required to substantially seal thetwo windows together, while still allowing for easy raising and loweringof movable window panel 18.

Preferably, the bonding process of the present invention utilizes twocomponent urethane adhesives, similar to commonly assigned U.S. Pat. No.5,853,895 issued to Lewno, which is hereby incorporated herein byreference. Alternately, the bonding processes may be substantiallysimilar to the processes disclosed in commonly assigned U.S. Pat. No.5,551,197 issued to Repp et al., which is also hereby incorporatedherein by reference. However, although window assembly 10 is shown anddescribed as having the fixed and movable window panels being bonded totheir respective components, clearly the present invention includesother known methods of fixedly or adhesively securing the variouselements together, or molding the frame members and/or seals to thewindow panels.

When installed within vehicle door 12, the perimeter frame 20, whichcomprises forward leg 30, upper member 26 and rearward leg 28, isinserted into the U-shaped channels formed in vehicle door 12, as shownin FIGS. 4A, 4B, 5 and 7. Divider 22 is then secured within vehicle door12 with a fastener (not shown) through bracket 34 and a correspondingattaching point (not shown) within vehicle door 12. Additional fasteners31 are preferably included to secure upper member 26 of frame 20 withinthe U-shaped channel 32 along the upper end of vehicle door 12. Thesefasteners may be threaded fasteners or Christmas tree fasteners or otherpush-fit type fasteners or the like and are installed in a conventionalmanner. Frame 20, seal 21 and fixed window panel 16 are thussubstantially secured within vehicle door 12. Because movement of windowassembly 10 is substantially precluded by the fasteners along uppermember 26 and at attaching bracket 34 on divider 22, no additionalfasteners are required to retain base portion 28 f of rearward leg 28and/or attaching portion 30 a of forward leg 30 to door 12.

Once installed, movable window panel 18 may slide upwardly to a closedposition and downwardly to an open position, while sliding portion 24 cof rail member 24 slidably engages one or both of the U-shaped channel22 a of divider 22 and a lower channel (not shown) within vehicle door12. Movable window panel 18 is preferably movable within vehicle door 12in a conventional manner such that it may be raised or lowered by thewindow mechanisms (not shown) of vehicle door 12. Vehicle door 12preferably also includes the lower channel member along which rail 24 isguided as movable window panel 18 is lowered below lower end 22 b ofdivider 22. The lower channel member is aligned with and interconnectedwith lower end 22 b of divider 22, such that there is a smoothtransition therebetween as movable window panel 18 is raised and/orlowered within vehicle door 12. However, divider 22 may alternately be aone piece extended channel member 22 f extending downwardly into vehicledoor 12, as shown in FIG. 12, such that a separate, lower channelaligned within the door is not necessary, without affecting the scope ofthe present invention. As movable window panel 18 moves along divider22, forward edge 18 c of movable window panel 18 correspondingly slidesbetween inner lip 23 a and outer lip 23 b of seal 21 along forward leg30. Slidable seal 38 or 39 and inner and outer lips 23 a and 23 bprovide a substantially airtight and watertight seal between rail 24 anddivider 22 and forward edge 18 c and forward leg 30, respectively, whileallowing relative movement therebetween. As mentioned above, theslidable seal may be bonded to either rail 24 or within U-shaped channel22 a of divider 22 and slidably engage the other component, withoutaffecting the scope of the present invention. A lower trim strip 46(FIG. 1) is also preferably added to vehicle door 12 to substantiallypreclude water and/or air from entering and exiting vehicle door 12along the lower edges of the window panels. Preferably, this seal allowsfor slidable engagement with movable window panel 18, as movable windowpanel 18 raises and lowers within vehicle door 12.

As shown in FIGS. 4A and 4B, when movable window panel 18 is in itsfully upward or closed position, bulb seal 21 b is substantiallycompressed by upper edge 18 b of movable window panel 18, such that seal21 extends outwardly from upper member 26 of frame 20. A portion of seal21 thus engages an outer wall 32 b and/or an outer leg 33 b of channel32 and bracket 33, respectively, thereby substantially precludingpassage of air and/or water therebetween. The edges of fixed windowpanel 16 and upper edge 18 b of movable window panel 18 may protrudeinto the U-shaped channels of vehicle door 12, such that a rounded overtrim portion 44 of the vehicle door 12 provides a visible framing of thewindows, thereby improving the overall appearance of the vehicle door.Alternately, other seals or trim pieces may be added to cover the edgeof the sheet metal or plastic door trim, in order to provide a finishedtrim around the perimeter of the door frame.

Although seal 21 is shown and described as a separate seal which is pushfit onto frame 20 of window assembly 10, it is further envisioned thatseal 21 may be integrally molded to the perimeter segments of frame 20.For example, the E-shaped frame 20 and corresponding seal 21 may bemolded in a two-shot molding process or may be integrally formed by twoseparate molds. This approach provides a window assembly with lowerassembly costs which also results in an improved seal between the seal21 and the frame 20. Additionally, this approach substantially precludesthe possibility that the seal will be accidentally detached from frame20 during the assembly of window assembly 10 to vehicle door 12. Theintegral molding of the seal to the frame also further facilitatesforming a seal along the perimeter frame which has varyingconfigurations therealong. A third shot molding process or an additionalmold may also be included to mold different portions of the seal out ofdifferent materials and/or in different cross sectional forms, whilestill maintaining a substantially continuous seal around the perimeterframe.

Referring now to FIGS. 6A and 6B, a frame member 120 is substantiallysimilar to frame 20 discussed above, except frame 120 includes an uppermember 126, which includes a mounting portion 126 a, a seal retainingportion 126 b and a generally horizontal portion 126 c extendingtherebetween. Mounting portion 126 a is secured along inner leg 33 a ofbracket 33, similar to upper member 26 discussed above, and extendsdownwardly within sheet metal channel 32. Horizontal section 126 cextends laterally outwardly from a lower edge of mounting portion 126 aand curves downwardly to form seal retaining portion 126 b. A resilientseal 121 b is provided at either side of seal retaining portion 126 b ofupper member 126, such that an inward seal 121 b′ engages outer surface18 g of movable window 18 when movable window 18 is at or near itsclosed position, while an outer seal 121 b″ engages outer leg 33 b ofbracket 33 and/or an outer lip of the vehicle sheet metal. Preferably, aplurality of reinforcement sections or gussets 126 d may be providedbetween attaching portion 126 a and horizontal portion 126 c, to enhancethe strength and rigidity of the upper member 126. Movable window 18 ismovable upwardly towards its closed position to a position laterallyinwardly from seal retaining portion 126. Resilient seal 121 b′ mayfurther include a bulbous portion (not shown) which is positionedbeneath and along horizontal section 126 c and which is compressible byupper edge 18 b of movable window 18 as movable window 18 is closed.Similar to upper member 26 discussed above, upper member 126 mayadditionally or otherwise be secured along an inner wall 32 a of thesheetmetal of vehicle door 12 or may be secured to both and include aplurality of recesses (not shown) spaced along mounting portion 126 a. Areinforcement member or web 126 e is provided along a lower edge of sealretaining portion 126 b, to enhance the strength and rigidity of sealretaining portion 126 b and to further enhance the securement ofresilient seals 121 b′ and 121 b″ therealong. Similar to frame 20discussed above, a forward leg of frame 120 is preferably substantiallysimilar to the cross section of upper member 126, with a resilient sealprovided along the seal retaining portion to allow for slidableengagement with a forward edge 18 c of movable window 18.

Referring now to FIGS. 9 and 10, an alternate embodiment of the presentinvention comprises a molded dividing member 222 and a molded guidemember 224. Similar to window assembly 10, discussed above, a fixedwindow panel 16 is secured along an outer mounting surface 222 e ofdividing member 222 and further secured along an upper portion and/orrearward leg portion of the framing member (not shown), while an outermounting surface 224 b of guide member 224 is secured along an edge 18 aat inner surface 18 d of movable window 18. The window panels 16 and 18may be secured along the dividing member 222 and guide member 224 by asuitable adhesive, or may be bonded thereto, similar to dividing member22 and guide member 24 of window assembly 10, discussed above.Preferably, dividing member 222 comprises a sliding portion or extension222 a which extends forwardly from dividing member 222 to engage acorrespondingly formed channel 224 c of guide member 224, such thatchannel or guide member 224 slidably receives extension 222 a withinchannel 224 c to allow slidable movement of movable window 18 relativeto fixed window panel 16. Preferably, a resilient slidable seal 238 isprovided between extension 222 a and channel 224 c to further guide andseal movable window panel 18 as it is opened and closed. Preferably,seal 238 is adhered or molded to extension 222 a and comprises one ormore lip member 238 a and 238 b extending outwardly from each side 222a′ and 222 a″, respectively, of extension 222 a. Preferably, slidableseal 238 is molded along extension 222 a of dividing member 222 and,more preferably, molded therealong as a second shot of a two-shotmolding process to form the frame and seals of the window assembly.However, the slidable seal may otherwise be molded or adhered to guidemember 224 within channel 224 c for slidable engagement with extension222 a of dividing member 222, without affecting the scope of the presentinvention.

As shown in FIG. 10, dividing member 222 is molded with and merges withan upper member, such as upper members 26 or 126, of the window frame.For example, in the illustrated embodiment, dividing member 222 ismolded with seal attaching portion 126 b of upper member 126 (FIGS. 6Aand 6B) at an upper end of dividing member 222.

Alternately, as shown in FIG. 11, movable window panel 18 may notinclude a guide member extending along rearward edge 18 a of innersurface 18 d of movable window panel 18. Rather, inner surface 18 d ofmovable window panel 18 may slidably engage a sliding seal 338 at adividing member 322, which is secured to inner surface 16 a of fixedwindow panel 16 and extends forwardly therefrom. Preferably, a mountingsurface 322 e of dividing member 322 is adhesively secured or bonded toinner surface 16 a of fixed window panel 16. Dividing member 322 extendsforwardly from forward edge 16 d of fixed window panel 16 and provides aseal mounting surface 322 a, which is positioned along inner surface 18d of movable window panel 18 and spaced laterally inwardly therefromwith respect to the vehicle. Sliding seal 338 is secured along sealmounting portion 322 a of dividing member 322, and is preferably moldedtherealong and, more preferably, molded therealong as a second shot in atwo step or two shot molding process for molding the frame and seal ofthe window assembly. Preferably, sliding seal 338 includes a pair oflaterally outwardly extending lips 338 a and 338 b, which form agenerally Y-shaped seal, such that the lips 338 a and 338 b engage innersurface 18 d of movable window panel 18 and flare and flex outwardlyfrom one another to provide a substantially air/water tight seal atinner surface 18 d along rearward edge 18 a of movable window panel 18.Dividing member 322 thus provides a slidable sealing engagement withmovable window panel 18 which substantially limits or precludes air andwater intrusion into and out from the vehicle interior, while providinga generally flush, continuous surface (including a slightly offsetsurface) between outer surfaces 18 g and 16 g of movable window panel 18and fixed window panel 16, respectively. As seen in FIG. 11, even thoughthe surfaces are described as providing a flush continuous surface,movable window panel 18 or the forward window panel is preferably spacedslightly laterally outwardly from the fixed or rearward window panel, tofurther limit or preclude air and/or water intrusion into or out fromthe vehicle compartment when the vehicle is being driven.

Referring now to FIGS. 13-17, a window assembly 410 is implemented in arear panel 412 of a vehicle 414, such as a pickup truck or the like.Window assembly 410 is preferably a modular assembly which may beinstalled at panel 412 of vehicle 414 and substantially encases a pairof side fixed window panels 416 and a larger generally rectangularvertically movable window panel 418 slidably positioned between fixedwindow panels 416. Movable panel 418 may be lowered into rear panel 412of vehicle 414 along a pair of tracks (not shown) within a lower rearpanel 413 of vehicle 414. As shown in FIG. 14, window assembly 410includes a framing member 420 which substantially surrounds fixed windowpanels 16 and movable window panel 18 along the upper and side perimeteredges thereof, and includes a pair of dividing members 422 unitarilyformed in one piece with framing member 420. Framing member 420preferably comprises an upper framing member 426 and a pair of oppositeside portions 428, which are curved or correspondingly formed with theshape of fixed window panels 416. As seen in FIG. 14, side portions 428of frame 420 may be generally C-shaped to accommodate attachment of thecurved fixed window panels 416. Dividing members 422 separate each fixedwindow panel 416 from a corresponding edge of movable window panel 418.Preferably, a resilient seal 421 (FIGS. 15 and 16) is positioned alongframe 420 to substantially preclude water and/or air leakage into or outfrom the passenger compartment of vehicle 414.

Similar to window assembly 10 discussed above, window assembly 410 ispreferably a modular assembly which is manufactured and assembled at awindow assembly plant which is located remotely from a vehicle assemblyplant. The window assembly module is then installed into an opening orrecess in the rear panel 412 of the vehicle 414 at the vehicle assemblyplant. Window assembly 410 is preferably a powered vertical slidingwindow assembly, such that movable window 418 is electrically raised andlowered via a power drive system, as is known in the art. However,window assembly 410 may comprise a manually movable window panel 418,without affecting the scope of the present invention. The window 418 islowered into lower panel 413 of vehicle 414 along tracks (not shown)within the panel.

As shown in FIG. 15, upper member 426 of frame 420 has a generallyrectangular cross section and comprises an inner seal retaining surface426 a and an outer seal retaining surface 426 b. Upper member 426 fitswithin a recessed region 412 a of rearward panel 412 of vehicle 414 andis secured to an outer sheetmetal wall 412 b and an inner sheetmetalwall 412 c of rearward panel 412 via a plurality of fasteners 431.Fasteners 431 may be a threaded stud or bolt which are secured to innerand outer sheetmetal walls 412 c and 412 b via correspondingly threadednuts 431 a. Each fastener 431 may be secured partially within uppermembers 426 and extend from inner seal retaining surface 426 a.Preferably, a pair of forwardly extending tabs or legs 426 c extendforwardly along seal surface 426 a and engage outer sheet metal wall 412b as upper portion 426 is secured thereto.

Preferably, an upper bead or seal 421 is secured along seal retainingsurface 426 a of upper member 426 and is compressedly positioned betweenupper member 426 and outer sheetmetal wall 412 b, to substantially sealupper member 426 to rear wall 412 of vehicle 414. Preferably, seal 421is a substantially solid yet resilient sealing member, such as a sealingbead or the like extending along upper member 426. Seal member 421preferably initially has a generally circular cross section and is thuscompressed to a generally oval form when upper member 426 is secured toouter and inner sheetmetal walls 412 b and 412 c.

Additionally, a resilient window seal 421 b is secured along outer sealsurface 426 b of upper member 426 and provides slidable engagement withinner surface 418 a of movable window panel 418 along an upper edge 418b thereof. Preferably, window seal 421 b is adhered to or bonded alongouter seal surface 426 b of upper member 426. Window seal 421 bpreferably comprises a bulbous portion 421 c and a downwardly andforwardly extending guide portion 421 d, which extends downwardly frombulbous portion 421 c and forwardly with respect to the vehicle. Guideportion 421 d functions to engage upper edge 418 b of movable windowpanel 418 as movable panel 418 is raised towards its closed position.Guide portion 421 d guides upper edge 418 b of movable under panel 418along seal 421 b such that window panel 418 slides upwardly along seal421 b and compresses bulbous portion 421 c of window seal 421 b aswindow panel 18 approaches its closed position. As shown in FIG. 15,bulbous portion 421 c of seal 421 b is initially expanded ornon-compressed, as shown generally in phantom at 421 c′, when movablewindow panel 418 is at least partially opened. When window panel 418 ismoved toward its closed position, inner surface 418 a at upper edge 418b compresses bulbous portion 421 c, such that a substantially air andwatertight seal is formed between movable window 418 and rear panel 412of vehicle 414.

Referring now to FIG. 16, side portions 428 of frame 420 have agenerally rectangular cross section and include an inner or forwardsealing surface 428 a and a rearward window surface 428 b. Although thecross-section view of FIG. 16 is taken along a vertical portion of sideportion 428, as shown in FIG. 14, side portion 428 of frame 420 issimilarly formed along the upper and lower regions of frame 420 wherefixed window panel 416 is secured. Similar to outer sheet metal wall 412b along upper frame member 426, an outer sheetmetal wall 412 d extendsaround an outer edge 416 a of fixed window panel 416 and further definesthe recess 412 a in which window assembly 410 is positioned. Preferably,a pair of forwardly extending tabs or legs 428 d extend forwardly alongseal surface 428 a and engage outer sheetmetal wall 412 d as sideportion 428 is secured thereto. Preferably, window surface 428 b of sideportion 428 is adhesively secured or bonded to an inner surface 416 b offixed window panel 416. Preferably, window surface 428 b is bonded alonga ceramic frit layer 416 c extending around the perimeter edge 416 a offixed window panel 416, similar to frit layer 16 e of fixed window panel16 discussed above. Side regions 428 of frame 420, and thus fixed windowpanel 416, are preferably secured to outer sheet metal 412 d and aninner sheet metal 412 e of rear panel 412 of vehicle 414 via one or morethreaded studs or bolts 428 c extending through outer and innersheetmetal walls 412 d and 412 e and threadedly engaging correspondinglythreaded nuts 429. Each fastener 428 c is preferably secured within acorrespondingly formed recess or opening (not shown) along seal surface428 a of side region 428 of frame 420, similar to fastener 431 of uppermember 426. A bead or seal member 425 is secured or adhered along sealsurface 428 a of side portion 428 and engages outer sheetmetal wall 412d when side region 428 is secured thereto. Preferably, seal 425 ismolded along seal portion 428 a, and most preferably, is molded as asecond shot of a two shot or two step process of forming the windowassembly. Seal 425 preferably has a generally circular cross sectionwhen uncompressed, such that when side portion 428 of frame 420 issecured to the sheetmetal walls 412 d, 412 e of vehicle 414, seal 425 iscompressed to a generally oval shape within the recess defined bysideframe 428 between seal surface 428 a and outer sheetmetal wall 412d, thereby substantially sealing side portion 428 to the rear panel 412of vehicle 414. Although shown as being secured by a threaded fastener,side portion 428 of frame 420 may be secured to sheetmetal walls 412 d,412 e via any known fastening means, such as clips, push pins or thelike.

Fixed window panels 416 are thus secured at their inner surfaces to acorresponding portion of side portions 428 of frame 420. As best shownin FIG. 17, each fixed window panel 416 is further secured at its innersurface 416 b to a dividing member 422 along a laterally inward edge 416d of fixed window panel 416. Dividing member 422 is preferablyadhesively secured or bonded to a ceramic frit layer 416 c at interiorsurface 416 b along the perimeter edges of the fixed window panel 416 b.Preferably, dividing member 422 comprises a mounting portion 422 a and arail portion 422 b, which extends laterally inwardly from inner edge 416d of each fixed window panel toward and generally forwardly of movablewindow panel 418. Preferably, mounting portion 422 a further includes aplurality of raised projections 422 c to enhance bonding of dividingmember 422 to fixed window panel 416, as discussed above with respect todividing member 22.

Movable window panel 418 is vertically slidable along and betweendividing members 422 of fixed window panels 416 via a pair of guidemembers 424, which extend along the laterally outward edges 418 c atinner surface 418 a of movable window panel 418. Preferably, guidemembers 424 are generally C-shaped channel members which slidablyreceive extension 422 b of dividing members 422 within a channel 424 adefined by a mounting portion 424 b, a forwardly spaced guide portion424 c, and a forwardly extending connector 424 d, similar to guidemember 224 discussed above Preferably, mounting portion 424 b of guidemembers 424 is adhesively secured or bonded to a ceramic frit layer 418d at inner surface 418 a along side edges 418 c of movable window panel418. Preferably, mounting portion 424 b further comprises a plurality ofprojections or dimples 424 e to enhance the bonding of mounting portion424 b to movable window panel 418, as discussed above.

A sliding seal 438 is provided within channel 424 a of guide member 424to slidably engage extension 422 b of dividing members 422, and thusprovide smooth sliding of movable window panel 418 relative to fixedwindow panels 416 and substantially preclude air and water intrusionbetween corresponding edges 416 d and 418 c of fixed window panels 416and movable window panel 418, respectively. Preferably, seal 438comprises a perimeter sealing body 438 a which extends around channel424 a and the pair of lips or flanges 438 b which extend inward intochannel 424 a from outer edges 438 c of seal body 438 a. Extension 422 bof dividing members 422 inserts between seal flanges 438 b, such thatseal flanges 438 b engaged along a portion of extension 422 b tosubstantially seal the extension 422 b therebetween. Preferably, seal438 further includes a rearwardly extending lip 438 d which extendsaround mounting portion 424 b of guide member 424 and may further insertwithin a gap between mounting member 424 b and inner surface 418 a ofmovable window panel 418. The gap is created by the projections 424 e.Alternately, the sliding seal may be secured to extension 422 b andslidably engage guide member 424, similar to sliding seal 38 discussedabove, without affecting the scope of the present invention. Althoughshown as a C-shaped guide member which slidingly receives an extensionfrom each of the dividing members, clearly the vertical sliding rearwindow assembly may otherwise include a pair of C-shaped dividingmembers on the fixed windows which slidably receive an extension from apair of corresponding guide members along each side edge of the movablewindow panel, similar to guide member 24 and dividing member 22,discussed above, without affecting the scope of the present invention.Alternately, movable window panel 418 or fixed window panels 416 mayinclude a guide and seal member which provides a slidable seal whichslidably engages an interior surface of the movable window panel,similar to dividing member 322, discussed above.

Similar to frame 20 and dividing member 22 of window assembly 10, frame420 and dividing members 422 are preferably integrally molded in onepiece of a substantially rigid plastic material, such as polyethyleneteraphthalate (PET), polypropylene, nylon,acrylonitrile-butadeine-styrene (ABS), thermoplastic urethane (TPU) orthe like. However, frame 420 may be otherwise formed from a formablemetal material or other rigid materials, without affecting the scope ofthe present invention. Preferably, the frame and dividing members areformed in a first step or first shot of a two step molding process. Theseal members 421 and 425 are preferably then molded to the correspondingframe portions in a second step or shot and/or third step or shot of atwo or three step molding process.

Although the fixed window panels and movable window panels are describedabove as being conventional glass windows for an automobile, it isfurther envisioned that one or both of these windows or panels may beformed or molded from a polymer material, such as a polycarbonatematerial. The fixed polycarbonate panel may then be integrally moldedwith the frame members and/or the seal to provide an integral window orpanel assembly. Such an approach substantially precludes gaps betweenthe fixed panel and the frame to further reduce wind noise and/orleakage therebetween. Additionally, the movable polycarbonate or glasspanel may be integrally molded with or bonded to the rail member toprovide a one piece movable window which slidably engages the dividingmember and the forward leg of the frame, while still providing aflush-mounted appearance between the two panels. The polycarbonatepanels may be clear or colored and may further be hard coated if desiredin order to reduce scratching thereon. Preferably, a protective coatingmay be applied to one or both of the polycarbonate panels in order toprotect the panels from deterioration from exposure to the elements.This protective coating preferably comprises an organic hard coat, aninorganic hard coat, or an organic/inorganic compound. Additionally, theprotective coating may include ultraviolet absorbers or stabilizers toprotect the polycarbonate panels from UV radiation degradation. Thiscoating or other additional coatings substantially reduces thesusceptibility of the panels to abrasion and/or ultraviolet degradation,thereby providing a substantially clear and durable glass-likeappearance to the panels.

Therefore, the present invention provides a window or panel assembly foruse in a vehicle and especially a rear side door and/or a back lite of avehicle which requires a minimal number of parts. Furthermore, theassembly module may be manufactured and assembled at a window assemblyplant located remotely from the vehicle assembly plant and may then beeasily installed to the vehicle at the vehicle assembly plant, sinceonly a few fasteners are required to secure the assembly to the vehicle.Additionally, the present invention results in an improved appearancedue to the substantially continuous flush surface between the fixed andmovable windows or panels. By molding the frame and/or the seal, eitherseparately or integrally, the overall appearance and performance of theframe and seal are also improved, since the one piece designsubstantially precludes seams or gaps from occurring in the corners orin the area immediately adjacent the connection of the divider to theupper member of the frame.

Changes and modifications in the specifically described embodiments canbe carried out without departing from the principles of the invention,which is intended to be limited only by the scope of the appendedclaims, as interpreted according to the principles of patent law.

The embodiments of the invention in which an exclusive property orprivilege is claimed are defined as follows:
 1. A window assembly modulefor a side door of a vehicle, said window assembly module comprising: aframe member having a perimeter frame and a dividing member, saidperimeter frame having a first portion and a second portion, said secondportion having a forward leg and an upper member; a fixed window panelhaving an inner and outer surface, said fixed window panel being securedto said first portion of said perimeter frame and said dividing member;a movable window panel having an inner and outer surface, said movablewindow panel having a first edge and a second edge; and a guide membersecured at said inner surface and along said first edge of said movablewindow panel, said guide member slidably engaging said dividing memberwhile said second edge of said movable window panel slidably engagessaid forward leg of said second portion of said perimeter frame, wherebysaid outer surfaces of said fixed and movable window panels form agenerally continuous surface when said movable window panel is at leastpartially closed.
 2. The window assembly module of claim 1, wherein saidframe member comprises a rigid plastic material.
 3. The window assemblymodule of claim 2, wherein said frame member includes a resilient sealmolded along said perimeter frame.
 4. The window assembly module ofclaim 3, wherein said resilient seal includes a compressible portionalong said first portion of said perimeter frame to seal said firstportion of said perimeter frame to the vehicle.
 5. The window assemblymodule of claim 4, wherein said resilient seal further includes a lipportion along said forward leg of said perimeter frame to slidably sealsaid movable window to said forward leg when said movable window is atleast partially closed.
 6. The window assembly module of claim 1 furtherincluding a sliding seal engagable between said dividing member and saidguide member.
 7. The window assembly module of claim 6, wherein saidsliding seal is bonded to said dividing member and slidably engages saidguide member.
 8. The window assembly module of claim 6, wherein saidsliding seal is bonded to said guide member and slidably engages saiddividing member.
 9. The window assembly module of claim 1, wherein saidguide member defines a generally C-shaped channel, said dividing memberbeing slidable within said channel.
 10. The window assembly module ofclaim 1, wherein said dividing member defines a generally C-shapedchannel, said guide member being slidable within said channel.